Difference between autofill and autoformat are as follows :
1.Autofill processing works by looking for data fields with common tags. If a non- standard name is used for certain fields.
2. Autofill, which is a feature found in some browsers that fills out the entire forms such as those that ask for shipping or billing information. Autocomplete is a feature that gives you suggestions as you type in a form field, like an address bar or search box.
1. By using AutoFormat, you can quickly apply formatting such as headings, bulleted and numbered lists, borders, ... For example, *computer* becomes computer .
2. AutoFormat controls some minor text formatting as you type..